645454311246 has 24 divisors (see below), whose sum is σ = 1403644810464. Its totient is φ = 214357518720.

The previous prime is 645454311179. The next prime is 645454311251. The reversal of 645454311246 is 642113454546.

645454311246 is a `hidden beast` number, since 6 + 4 + 54 + 543 + 1 + 12 + 46 = 666.

It is a super-2 number, since 2×645454311246² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 66154851 + ... + 66164606.

It is an arithmetic number, because the mean of its divisors is an integer number (58485200436).

Almost surely, 2^645454311246 is an apocalyptic number.

645454311246 is an abundant number, since it is smaller than the sum of its proper divisors (758190499218).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

645454311246 is a wasteful number, since it uses less digits than its factorization.

645454311246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132319736 (or 132319733 counting only the distinct ones).

The product of its digits is 1382400, while the sum is 45.

The spelling of 645454311246 in words is "six hundred forty-five billion, four hundred fifty-four million, three hundred eleven thousand, two hundred forty-six".